Each employee of HealthFirst Medical Group is dedicated to exceeding our patient’s expectations by providing timely, compassionate, and individualized customer service and medical care. We are committed to treating each patient with respect and dignity…

Ronald Crowell, M.D.

  • Medical Director/Owner
  • Board Certified Emergency Medicine
  • Industrial Medicine Experience, since 1980
  • Mini-Residency in Occupational Medicine
  • Past Director of Downey Community Hospital Emergency Department

Gregory Ogata, M.D.

  • Full-Time Physician, since 1995
  • Board Eligible in Emergency Medicine
  • Emergency/Industrial Medicine Experience, since 1988

Michael Hadley, M.D.

  • Full-Time Physician, since 2010
  • Industrial Medicine Experience, since 1986
  • Workers Compensation Systems Specialist
  • Experienced Case Manager

Michael Green, D.O.

  • Full-Time Physician
  • Occupational Medicine Experience, since 1992

Physician Assistants:

Keith McGill, PA-C, D.O.

  • HealthFirst Physician Assistant, since 2000

Karen Delahoussaye, PA-C

  • HealthFirst Physician Assistant, since 2013

John Onofre, PA-C

  • HealthFirst Physician Assistant, since 2015

Physical Therapist:

Fred Crum, RPT

  • Registered Physical Therapist
  • HealthFirst Physical Therapist, since 1992

Orthopedic Specialists:

Matthew Longacre, M.D.

  •  Board Certified Orthopedic Surgery

Arash Yaghoobian, M.D.

  • Orthopedic Surgery – Spine Specialist

Paul Casey, M.D.

  • Board Certified Orthopedic Surgery – Hand Specialist

Pain Management Specialist:

Ronald Bishop, M.D.

  • Pain Management Specialist


Robin Collier, L.AC

  • Acupuncture